You can put this solution on YOUR website!
use FOIL(First Outer Inner Last) Method
now if u need it all over the common denom which is simply multiplying everything by the common 1/1 = ((1*2*3*4)/(1*2*3*4)) = 24/24
writing this out is a lot more work then doing this in my head...i suggest u memorize the process and do it in your head its way faster.
below shows cross outs
multiplied outcome:
this was a pain to code in here hope this is clear enough.